2. Extending a Volume in Vxvm

2. Extending a Volume
Caution : If you plan to use volume size change (grow or shrink ) on a volume with data make sure you have the good backup of the volume available before carrying out such operation .
2.1 Extending a volume up to certain length,
Command syntax
· vxassist growto volume_name length
To extend vol3 upto 8000 sectors, type:
· #vxassist growto vol3 8000
2.2 Extending by a Given Length
Command Syntax
· vxassist growby volume_name length
To extend volapp by 1000 sectors, type:
· #vxassist growby volapp 1000

3. Shrinking a Volume
Caution – Do not shrink a volume below the size of the file system. If you have a VxFS file system, you can shrink the file system and then shrink the volume. If you do not shrink the file system first, you risk unrecoverable data loss.
Always make sure you have a good backup of the data volume to be shirnked.

3.1 Shrinking to a Given Length
Shrink a volume to a specific length as follows:
· vxassist shrinkto volume_name length
Make sure you do not shrink the volume below the current size of the file system or database using the volume. This command can be safely used on empty volumes.
To shrink volcat to 1300 sectors, type:
· #vxassist shrinkto volcat 1300
3.2 Shrinking by a Given Length
Shrink a volume by a specific length as follows:
· vxassist shrinkby volume_name length
To shrink volcat by 8000 sectors, type:
· #vxassist shrinkby volapp2 8000